Numerical analysis of bodyworn UHF antenna systems
Numerical analysis of bodyworn UHF antenna systems
复制标题
随身佩戴 UHF 天线系统的数值分析
DOI：
10.1049/ecej:20010203
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
N. Evans
中科院分区：
文献类型：
--
作者：
W. Scanlon;N. Evans
穿戴式天线广泛应用于医疗、军事和个人通信领域，但从人体表面进行可靠通信仍然面临着一系列工程挑战。在UHF和微波频率下，由于组织中的电磁吸收、辐射图案碎片化和馈电点阻抗的变化，穿戴式天线可能会降低效率。这些影响的意义和性质是系统特定的，并取决于工作频率，传播环境和天线本身的物理约束。本文介绍了如何数值电磁建模技术，如FDTD（时域有限差分法），可用于设计的体戴天线。例子是418 MHz，916/spl middot/5 MHz和2/spl middot/45 GHz的背景下，生物医学信号和无线个人区域网络应用，如蓝牙/supTM/无线技术。
Bodyworn antennas are found in a wide range of medical, military and personal communication applications, yet reliable communication from the surface of the human body still presents a range of engineering challenges. At UHF and microwave frequencies, bodyworn antennas can suffer from reduced efficiency due to electromagnetic absorption in tissue, radiation pattern fragmentation and variations in feed-point impedance. The significance and nature of these effects are system specific and depend on the operating frequency, propagation environment and physical constraints on the antenna itself. This paper describes how numerical electromagnetic modelling techniques such as FDTD (finite-difference time-domain) can be used in the design of bodyworn antennas. Examples are presented for 418 MHz, 916/spl middot/5 MHz and 2/spl middot/45 GHz, in the context of both biomedical signalling and wireless personal-area networking applications such as the Bluetooth/sup TM/ wireless technology.